CPT 21230Surgery

Rib cartilage graft

CPT code 21230 covers the surgical procedure where a surgeon harvests cartilage from a patient's rib to use as a graft for reconstructive purposes. This cartilage can be transplanted to rebuild facial structures, ears, nose, or other areas requiring cartilage reconstruction.

Showing rates for

National Average

Base Medicare rate

$730.38

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

11.17

PE RVU (NF)

9.61

MP RVU

1.8

Total RVU

22.58

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Always bill 21230 separately from the primary reconstruction code (e.g., rhinoplasty, ear reconstruction) as this represents the donor site harvest, not the reconstruction itself
Impact: Ensures capture of full $730.38 payment; failure to bill separately results in loss of 11.17 work RVUs and associated reimbursement
Append modifier 59 or XS when billing with rhinoplasty codes (30400-30420) as CCI edits may bundle 21230 into primary nasal procedures
Impact: Prevents automatic denial; unbundling can recover $730.38 that would otherwise be lost to bundling edits
Document the specific rib(s) harvested, amount of cartilage obtained, and time spent on harvest separate from the reconstruction operative time
Impact: Supports medical necessity and separate procedure billing; reduces audit risk and strengthens appeals by 60-80%
Verify payer-specific policies on bilateral modifier 50 usage, as some payers do not recognize bilateral rib harvests with enhanced payment
Impact: Prevents claim rejection; when bilateral is recognized, captures additional $365.19 (50% of base rate)
For revision cases requiring cartilage harvest after previous chest surgery, document increased complexity and consider modifier 22 with comparison to typical case
Impact: Can increase reimbursement by $146-292 (20-40%) when properly documented with additional operative time and complexity noted
Check if the primary reconstruction code includes 'with graft' in descriptor before billing 21230 separately to avoid unbundling violations
Prevents fraudulent billing allegations; codes like 21210 include grafting and should not be billed with 21230

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Frequently asked questions

What is the 2025 Medicare reimbursement rate for CPT code 21230?

The 2025 Medicare national average payment for CPT 21230 is $730.38 for both facility and non-facility settings, based on 22.58 total RVUs and a conversion factor of 32.3465.

Can CPT 21230 be billed with rhinoplasty codes?

Yes, 21230 can be billed separately with rhinoplasty codes (30400-30420) when rib cartilage is harvested for nasal reconstruction, but typically requires modifier 59 or XS to bypass CCI edits that may bundle the harvest into the primary procedure. Documentation must clearly support the separate nature of the harvest.

What is the difference between CPT 21230 and CPT 20926?

CPT 21230 specifically describes rib cartilage graft harvest, while CPT 20926 describes tissue grafts from other donor sites. Use 21230 only when harvesting costal (rib) cartilage; 20926 applies to fascia lata, paratenon, or other tissue harvests from non-rib locations.

How many RVUs is CPT code 21230 worth in 2025?

CPT 21230 has 22.58 total RVUs in 2025, comprised of 11.17 work RVUs, 9.61 practice expense RVUs, and 1.8 malpractice RVUs. The facility and non-facility PE RVUs are identical at 9.61.

Is CPT 21230 subject to the multiple procedure reduction?

Yes, when billed as a secondary procedure with modifier 51, CPT 21230 is typically subject to the 50% multiple procedure payment reduction. However, when properly documented as medically necessary and distinct, modifier 59 may allow full payment alongside the primary reconstruction.

What documentation is required to bill CPT 21230 separately?

Required documentation includes: the specific rib harvested, separate incision details, cartilage dimensions obtained, harvest technique, medical necessity for autologous rib cartilage, time spent on harvest separate from reconstruction, and clear description of the cartilage's use in the primary procedure.

Does CPT 21230 require a specific modifier for bilateral rib cartilage harvest?

When harvesting rib cartilage from both sides of the chest in the same session, modifier 50 (bilateral procedure) should be appended to CPT 21230. However, verify payer-specific policies as not all payers recognize bilateral payment adjustments for this code, which could increase reimbursement to approximately $1,095.57.